Chain dismounting tool

By introducing a limiting and oil-proof mechanism into the chain disassembly fixture, the problems of loosening of the forward and reverse screws and lubricating oil leakage were solved, achieving stable and convenient use of the device.

CN224266037UActive Publication Date: 2026-05-22ZHEJIANG HENGJIU SAW CHAIN CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHEJIANG HENGJIU SAW CHAIN CO LTD
Filing Date
2025-05-09
Publication Date
2026-05-22

AI Technical Summary

Technical Problem

The existing chain disassembly fixture lacks a limiting mechanism, which makes the forward and reverse screws easy to loosen and affect use; and there is no oil prevention mechanism, so lubricating oil can easily fall into the housing.

Method used

The design includes a limiting mechanism and an oil-proof mechanism, comprising components such as a connecting block, spring, moving block, moving sleeve, push block, and limiting sleeve. The limiting sleeve, in conjunction with the friction sleeve, prevents the forward and reverse screws from loosening. Components such as a connecting sleeve, telescopic sleeve, fixing block, slot, and elastic sponge are also included to prevent lubricating oil from falling out.

Benefits of technology

It effectively prevents the forward and reverse screws from loosening, ensuring stable operation of the device and preventing lubricating oil from entering the housing, thus improving the ease of use of the device.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to the technical field of tools, and particularly relates to a chain disassembling tool which comprises a shell, a positive and negative screw rod is rotationally connected into the shell, a handle is fixedly connected to the right end of the positive and negative screw rod, a bearing is fixedly connected into the shell in a sleeved mode, and the positive and negative screw rod is fixedly connected into an inner ring of the bearing in a sleeved mode. The outer side of the positive and negative screw is connected with a threaded block through threads, the threaded block is slidably connected with the shell, the upper end of the threaded block is fixedly connected with a supporting block, and the outer side of the supporting block is fixedly connected with a pull ring. By designing the connecting sleeve, the telescopic sleeve, the fixing block, the clamping groove, the clamping block, the elastic sponge and other components, the connecting sleeve is moved to drive the telescopic sleeve, the fixing block and the clamping groove to move, and after the connecting sleeve moves to a designated position on the shell, the clamping block moves into the clamping groove, so that the telescopic sleeve and other components are limited; and therefore, lubricating oil on the chain is prevented from falling into the shell, and the device is convenient to use.
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Description

Technical Field

[0001] This utility model relates to the field of tooling technology, specifically a chain disassembly tool. Background Technology

[0002] A chain disassembly fixture is a tool used to disassemble chains. It is usually made of steel and is used to limit the movement of the chain. Chain disassembly fixtures are commonly used to disassemble chains on equipment such as bicycles, motorcycles, and chain conveyors. For example, utility model patent CN219900126U discloses an auxiliary tool for disassembling and installing double-row chains, including a support body, a threaded rod, sliding blocks, and chain hooks. The support body has a rectangular through hole in the middle and split bearing holes at both ends. The two ends of the threaded rod are set in the bearing holes. Half of the threaded rod is a left-hand thread and the other half is a right-hand thread. The two sliding blocks are respectively provided with left-hand threads and right-hand threads, which are connected to the threaded rod. The two sliding blocks are guided by the through hole and move closer or further away from each other in the through hole. The lower end of the sliding block is provided with a sliding track, and one end of the chain hook is set on the sliding track. Each sliding block has two chain hooks at the lower part. The device has a simple structure, no easily damaged parts, and is easy to carry. It perfectly solves the cumbersome steps of multiple people cooperating in the installation or disassembly of double-row chains and the removal and tightening of anchor bolts when maintenance personnel are installing or disassembling them. However, in the existing technology, the device lacks a limiting mechanism during use, making it difficult to limit the forward and reverse screws. This causes the screws to loosen easily, affecting the normal operation of the device. Furthermore, the device lacks an oil-proof mechanism, allowing lubricating oil from the chain to easily drip into the housing, further hindering its use. Therefore, improvements are needed. Utility Model Content

[0003] The purpose of this utility model is to provide a chain disassembly fixture, which solves the problems that when the device is in use, the lack of a limiting mechanism makes it difficult to limit the positive and negative screws, causing the positive and negative screws on the device to loosen easily, thus affecting the normal use of the device. In addition, the lack of an oil prevention mechanism makes it easy for lubricating oil on the chain to fall into the housing, causing inconvenience and difficulty in using the device.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a chain disassembly fixture, comprising a housing, a positive and negative screw rotatably connected inside the housing, a handle fixedly connected to the right end of the positive and negative screw, a bearing fixedly sleeved inside the housing, a positive and negative screw fixedly sleeved inside the inner ring of the bearing, a threaded block threadedly connected to the outer side of the positive and negative screw, the threaded block slidably connected to the housing, a support block fixedly connected to the upper end of the threaded block, a pull ring fixedly connected to the outer side of the support block, a limit mechanism provided inside the housing, and an oil-proof mechanism provided inside the housing.

[0005] Preferably, the limiting mechanism includes a connecting block, which is slidably connected inside the housing. A spring is installed inside the housing. A movable block is fixedly connected to the right side of the connecting block. A movable sleeve is fixedly connected to the right end of the movable block. A push block is fixedly connected to the outer side of the movable sleeve. A limiting sleeve is fixedly connected to the outer side of the movable sleeve. A friction sleeve is fixedly connected to the outer side of the handle. The friction sleeve contacts the limiting sleeve. By moving the limiting sleeve to separate from the friction sleeve, and then rotating the handle, the forward and reverse screws and the friction sleeve rotate. After the handle stops rotating, the limiting sleeve moves to contact the friction sleeve, thereby limiting the forward and reverse screws and preventing them from loosening.

[0006] Preferably, one end of the spring is fixedly connected to the connecting block, and the other end of the spring is fixedly connected to the housing. By designing the spring, the connecting block has an elastic force.

[0007] Preferably, the oil-proof mechanism includes a connecting sleeve, with the upper end of the housing in contact with the connecting sleeve, and a fixing block fixedly connected to the lower end of the connecting sleeve. The fixing block contacts the housing, and a slot is formed inside the fixing block. A locking block is slidably connected inside the slot. An elastic sponge is provided inside the housing, and a sliding groove is formed inside the housing. A guide block is slidably connected inside the sliding groove, and the guide block is fixedly connected to the locking block. A friction block is slidably connected inside the sliding groove, and a guide block is fixedly connected to the friction block. The housing and the locking block are slidably connected. By moving the connecting sleeve, the telescopic sleeve, the fixing block, and the slot are moved. After the connecting sleeve moves to a designated position on the housing, the locking block moves into the slot, thereby limiting the telescopic sleeve and other components and preventing lubricating oil on the chain from falling into the housing, making the device easy to use.

[0008] Preferably, the connecting sleeve has an internal telescopic sleeve, and the telescopic sleeve has a threaded block in contact with the inside. By designing the telescopic sleeve, the lubricating oil on the chain can be prevented from falling into the housing.

[0009] Preferably, one end of the elastic sponge is fixedly connected to the card block, and the other end of the elastic sponge is fixedly connected to the shell. By designing the elastic sponge, the card block has an elastic effect.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] 1. This utility model designs components such as a connecting block, spring, moving block, moving sleeve, push block, and limiting sleeve. The moving limiting sleeve is separated from the friction sleeve. Then, the handle is rotated to drive the positive and negative screws and the friction sleeve to rotate. After the handle stops rotating, the limiting sleeve is moved to contact the friction sleeve, thereby limiting the positive and negative screws and preventing the positive and negative screws on the device from becoming loose.

[0012] 2. This utility model designs components such as a connecting sleeve, a telescopic sleeve, a fixing block, a slot, a locking block, and an elastic sponge. The moving connecting sleeve drives the telescopic sleeve, the fixing block, and the slot to move. After the connecting sleeve moves to the designated position on the housing, the locking block moves into the slot, thereby limiting the telescopic sleeve and other components and preventing the lubricating oil on the chain from falling into the housing, making the device easy to use. Attached Figure Description

[0013] Figure 1 This is a perspective view of the overall structure of this utility model;

[0014] Figure 2 This utility model Figure 1 Partial structural cross-section Figure 1 ;

[0015] Figure 3 This utility model Figure 1 Partial structural cross-section Figure 2 ;

[0016] Figure 4 This utility model Figure 3 Enlarged view of the handle;

[0017] Figure 5 This utility model Figure 2 Enlarged view of point A.

[0018] In the diagram: 1. Housing; 2. Positive and negative screws; 3. Handle; 4. Bearing; 5. Threaded block; 6. Support block; 7. Pull ring; 8. Limiting mechanism; 81. Connecting block; 82. Spring; 83. Moving block; 84. Moving sleeve; 85. Push block; 86. Limiting sleeve; 87. Friction sleeve; 9. Oil-proof mechanism; 91. Connecting sleeve; 92. Telescopic sleeve; 93. Fixing block; 94. Slot; 95. Locking block; 96. Elastic sponge; 97. Sliding groove; 98. Guide block; 99. Friction block. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-5A chain disassembly fixture includes a housing 1, with a positive and negative screw 2 rotatably connected inside the housing 1. A handle 3 is fixedly connected to the right end of the positive and negative screw 2. A bearing 4 is fixedly sleeved inside the housing 1. The positive and negative screw 2 is fixedly sleeved inside the inner ring of the bearing 4. A threaded block 5 is threadedly connected to the outside of the positive and negative screw 2. The threaded block 5 is slidably connected to the housing 1. A support block 6 is fixedly connected to the upper end of the threaded block 5. A pull ring 7 is fixedly connected to the outside of the support block 6. A limit mechanism 8 and an oil prevention mechanism 9 are provided inside the housing 1.

[0021] Please see Figure 4 The limiting mechanism 8 includes a connecting block 81, which is slidably connected inside the housing 1. A spring 82 is installed inside the housing 1. One end of the spring 82 is fixedly connected to the connecting block 81, and the other end of the spring 82 is fixedly connected to the housing 1. By designing the spring 82, the connecting block 81 has an elastic force. A moving block 83 is fixedly connected to the right side of the connecting block 81. A moving sleeve 84 is fixedly connected to the right end of the moving block 83. A push block 85 is fixedly connected to the outside of the moving sleeve 84. A limiting sleeve 86 is fixedly connected to the outside of the moving sleeve 84. A friction sleeve 87 is fixedly connected to the outside of the handle 3. The friction sleeve 87 contacts the limiting sleeve 86. The limiting sleeve 86 is moved to separate from the friction sleeve 87. Then, the handle 3 is rotated to drive the positive and negative screws 2 and the friction sleeve 87 to rotate. After the handle 3 stops rotating, the limiting sleeve 86 is moved to contact the friction sleeve 87, thereby limiting the positive and negative screws 2 and preventing the positive and negative screws 2 on the device from becoming loose.

[0022] Please see Figure 1 , Figure 2 , Figure 3 , Figure 5The oil-proof mechanism 9 includes a connecting sleeve 91, which is in contact with the upper end of the housing 1. A telescopic sleeve 92 is located inside the connecting sleeve 91, and a threaded block 5 is in contact with the inside of the telescopic sleeve 92. The telescopic sleeve 92 is designed to prevent lubricating oil from the chain from falling into the housing 1. A fixing block 93 is fixedly connected to the lower end of the connecting sleeve 91, and the fixing block 93 contacts the housing 1. A slot 94 is provided inside the fixing block 93, and a locking block 95 is slidably connected inside the slot 94. An elastic sponge 96 is provided inside the housing 1. One end of the elastic sponge 96 is fixedly connected to the locking block 95, and the other end is fixedly connected to the housing 1. The elastic sponge 96... This design allows the locking block 95 to have an elastic effect. The interior of the housing 1 has a sliding groove 97, and a guide block 98 is slidably connected inside the sliding groove 97. The guide block 98 is fixedly connected to the locking block 95. A friction block 99 is slidably connected inside the sliding groove 97, and the guide block 98 is fixedly connected to the friction block 99. The housing 1 and the locking block 95 are slidably connected. By moving the connecting sleeve 91, the telescopic sleeve 92, the fixed block 93, and the locking groove 94 are moved. After the connecting sleeve 91 moves to the designated position on the housing 1, the locking block 95 moves into the locking groove 94, thereby limiting the telescopic sleeve 92 and other components, thus preventing the lubricating oil on the chain from falling into the housing 1, making the device easy to use.

[0023] The specific implementation process of this utility model is as follows: Before the device is used, the movable connecting sleeve 91 moves towards the housing 1. The movement of the connecting sleeve 91 drives the telescopic sleeve 92 and the fixing block 93 to move. The movement of the fixing block 93 drives the slot 94 to move. The fixing block 93 moves into the housing 1 and contacts the locking block 95, which in turn causes the locking block 95 to move towards the elastic sponge 96. The movement of the locking block 95 drives the guide block 98 to move. The movement of the guide block 98 drives the friction block 99 to move. After the locking block 95 moves and the elastic sponge 96 and the connecting sleeve 91 contact the designated position on the housing 1, the telescopic sleeve 92 contacts the designated position of the threaded block 5. The fixing block 93 and the slot 94 move to the designated position inside the housing 1. The elastic force of the elastic sponge 96 pushes the locking block 95 to move. The movement of the locking block 95 drives the guide block 98 and the friction block 99 to move. The locking block 95 moves into the slot 94, thereby limiting the telescopic sleeve 92 and other components, thus preventing the lubricating oil on the chain from falling into the housing 1, making the device easy to use.

[0024] When the device is in use, the chain is moved to the designated position above the housing 1, pushing the push block 85 towards the housing 1. The movement of the push block 85 causes the moving sleeve 84 to move, which in turn causes the moving block 83 and the limiting sleeve 86 to move. The movement of the moving sleeve 84 causes the connecting block 81 to move, which compresses the spring 82. The limiting sleeve 86 moves and separates from the friction sleeve 87. Then, the handle 3 is rotated, which causes the friction sleeve 87 and the positive and negative screws 2 to rotate. The rotation of the positive and negative screws 2 causes threaded motion with the threaded block 5, thereby causing relative displacement of the threaded block 5. The movement of block 5 causes support block 6 to move, which in turn causes pull ring 7 to move. Pull ring 7 then contacts the chain, stretching the chain to a specified position and thus limiting its movement. Then, push block 85 is released, and the elastic force of spring 82 pushes connecting block 81 to move. Connecting block 81 moves, causing moving block 83 to move, which in turn moves moving sleeve 84. Moving sleeve 84 moves, causing push block 85 and limiting sleeve 86 to move. Limiting sleeve 86 contacts friction sleeve 87, thus limiting the positive and negative screws 2 and preventing them from loosening.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A chain disassembly fixture, comprising a housing (1), characterized in that: The housing (1) is rotatably connected to a positive and negative screw (2). The right end of the positive and negative screw (2) is fixedly connected to a handle (3). The housing (1) is fixedly fitted with a bearing (4). The inner ring of the bearing (4) is fixedly fitted with a positive and negative screw (2). The outside of the positive and negative screw (2) is connected to a threaded block (5) by a thread. The threaded block (5) is slidably connected to the housing (1). The upper end of the threaded block (5) is fixedly connected to a support block (6). The outside of the support block (6) is fixedly connected to a pull ring (7). The housing (1) is provided with a limit mechanism (8). The housing (1) is provided with an oil prevention mechanism (9).

2. The chain disassembly fixture according to claim 1, characterized in that: The limiting mechanism (8) includes a connecting block (81), the connecting block (81) is slidably connected inside the housing (1), a spring (82) is provided inside the housing (1), a moving block (83) is fixedly connected to the right side of the connecting block (81), a moving sleeve (84) is fixedly connected to the right end of the moving block (83), a push block (85) is fixedly connected to the outside of the moving sleeve (84), a limiting sleeve (86) is fixedly connected to the outside of the moving sleeve (84), a friction sleeve (87) is fixedly connected to the outside of the handle (3), and the friction sleeve (87) contacts the limiting sleeve (86).

3. The chain disassembly fixture according to claim 2, characterized in that: One end of the spring (82) is fixedly connected to the connecting block (81), and the other end of the spring (82) is fixedly connected to the housing (1).

4. The chain disassembly fixture according to claim 1, characterized in that: The oil-proof mechanism (9) includes a connecting sleeve (91), the upper end of the housing (1) is in contact with the connecting sleeve (91), the lower end of the connecting sleeve (91) is fixedly connected to a fixing block (93), the fixing block (93) is in contact with the housing (1), the fixing block (93) has a slot (94) inside, the slot (94) has a slidably connected block (95) inside, the housing (1) has an elastic sponge (96) inside, the housing (1) has a sliding groove (97) inside, the sliding groove (97) has a guide block (98) slidably connected to the sliding groove (97), the guide block (98) is fixedly connected to the block (95), the sliding groove (97) has a friction block (99) slidably connected to the sliding groove (97), the friction block (99) has a guide block (98) fixedly connected to the friction block (99), and the housing (1) is slidably connected to the block (95).

5. A chain disassembly fixture according to claim 4, characterized in that: The connecting sleeve (91) has a telescopic sleeve (92) inside, and the telescopic sleeve (92) has a threaded block (5) in contact with the inside.

6. A chain disassembly fixture according to claim 4, characterized in that: One end of the elastic sponge (96) is fixedly connected to the card block (95), and the other end of the elastic sponge (96) is fixedly connected to the shell (1).